Tank stabilizer for anesthetizing machines



E. J. STEVENS El AL TANK STABILIZER FOR ANESTHETIZING MACHINES Filed Aug. 29, 1938 Fig-1 z if 40 2 I I4 24 28 Inventors.

E.I'.Si:evens. J'a A.He(dbr-|.nk. 55% MW Attorneys Patented Aug. 8, 1939 UNITED STATES PATENT OFFlCE TANK STABILIZER FOR- ANES'IHETIZING MACHINES Eugene J. Stevens and Jay A. Heidbrink, Minneapolis, Minn., assignors to The Ohio Chemical and Manufacturing v(J'ompany,

Ohio, a corporation Cleveland,

6 Claims.

Our invention relates to tank stabilizers for anesthetizing machines and has for its object to provide, in connection with the supporting neck of a tank containing anesthetizing gas such as nitrous oxide or other gas to be delivered to a patient, means such that the securing means of gas machine tank yokes, as originally made and employed in such tank yokes, will, in securing the tank in the yoke, automatically move members against the inner walls of the yoke so as to hold the tank connected in the yoke in such manner that it cannot swing or at any time be moved in relation to the yoke.

In connection with anesthetizing machines it is customary to provide a yoke having a port and connected passageway leading to the gas administering chambers and passageways of the anesthetizing machine. In practice a tank of the desired gas is secured within this yoke by means of a screw and hand wheel, the screw having a conical point which fits into a conical seat formed in the securing neck of the tank. On the securing neck there is a needle valve adapted to be operated by a wrench and a seat adapted to be pressed against a similar seat within the yoke so that when the hand wheel is turned up firmly a normally gas tight connection is made from the tank to the gas administering machine and the gas may be delivered by operating the aforesaid needle valve.

A serious disadvantage of this form of connection of the valve head and tank to the yoke of a gas administering machine has been that no matter how tightly the hand screw is turned .35 against the seat, it is always possible to rock the tank and from this rocking the gas seal may be broken with subsequent gas leakage.

It is the object of our invention to overcome this defect by simple means adapted to be used 40 in connection with the yokes of any type of gas administering machine.

In the drawing illustrating the application of our invention in one form,

Fig. 1 is a side elevation view of a tank valve head and machine yoke partly in section.

Fig. 2 is a sectional View taken on line 22 of Fig. 1.

Fig. 3 is a sectional view taken on line 33 of 50 Fig. 1.

Fig. 4 is a fragmentary perspective view of a part of the valve head.

Fig. 5 is a sectional plan view taken on line 5-5 of Fig. 1. 55 Fig. 6 is a sectional plan view similar to the view of Fig. 5 with the hand screw in non-clamping position.

The full objects and advantages of our invention will be made to appear more fully in the detailed description thereof and the combination 5 of its novel features are particularly pointed out in the claims. As illustrated, a gas tank [0 is provided with a valve head II which forms a connecting neck extension from tank H1. The valve head includes passageways I2 and I3 and 10 a needle valve 14 operated by a wrench from its faced end [5. A yoke l6, best shown in detail in Fig. 5, is formed with a seat I'l against which a correspondingly formed seat in the face of the valve head H is adapted to be forced to effect 15 a sealing connection. This is accomplished by a powerful set screw l9 threaded through the yoke at 20 operated by a hand wheel 2| and formed with a conical point 22 which engages a conical seat 23 in the side of the valve head H 20 opposite to the seat ll. By this means the valve head ll of tank I9 is firmly secured in the yoke and seated so that in theory there is a gas tight union between the yoke and the valve head for permitting gas to flow from passageway l3 into 25 and through the passageways and chambers of the gas administering machine. The above features are all well known and of customary use in securing tanks containing compressed gases operatively in a gas administering machine. 30

As a feature of our improvements, we form in the valve head H, a transverse depression 24, shown best in detail in Figs. 1 and 4. At the center of the back of this depression is formed the conical seat 23 in exactly the manner in which said conical seat is customarily formed on the flat face of the valve head. Upon the back of the depression 24 are secured a pair of pins 25 and 26, as clearly shown in Figs. 3 and 4. Seated in the depression 24 are oppositely disposed plates 21 and 28, the pins 25 and 26 extending through slots 29 and 30, as clearly shown in Fig. 3. The plates are cut away as indicated at 3! to provide contact feet 32 and 33 and on the insides of the plates 21 and 28 there are formed walls 34 and 35 which slope inwardly and are preferably in the form of segments of cones, as clearly shown in Fig. 3. The plates 21 and 28 are held to slide freely transversely to the valve head II by means of an overlying plate 31 which is secured to the face of the valve head II by screws, as clearly shown in Figs. 1 and 2. This plate 31 is provided with a central circular opening 40, sufficiently large to permit the set screw 20 to pass freely through it. The conical or sloping inner faces of plates 21 and 28 are in the path of movement of the conical point 22 on set screw 20. When, therefore, the set screw is turned inwardly by means of the hand wheel 2|, the conical point 22 engages the sloping surfaces of plates 21 and 28 thereby causing them to move in opposite directions toward the walls 38 and 39 of yoke member It. When, therefore, the set screw has been turned with sufiicient force to bring the feet 32 and 33 of the plates 21 and 28 firmly into engagement with side walls 38 and 39 of yoke member I6, as clearly shown in Fig. 5, by this means not only is the valve head ll firmly secured within the yoke It so that its passageway 13 will be put in gas tight communication with the passageways in the gas administering machine, but at the same time the valve head II, which constitutes the supporting neck of the tank ill, will be powerfully locked against the inside side walls of yoke member l6 and thus held against any possible swinging or twisting movement whereby the sealing of the communicating passageways between valve head and yoke of the gas administering machine will not only be made gas tight, but will be continu" ously held gas tight.

The advantages of our invention and the manner of operating it, have been quite fully given heretofore. The principal advantage, however, is found in the fact that this construction is applicable to yokes of gas administering machines of different makes and having different types of yokes, so that gas containers embodying the advantages of our stabilizer can be attached to any of the well known forms of yokes of gas administering machines without modifying in any respect the construction of such machines.

We claim:

1. In combination with the valve head of a gas tank and the securing yoke of a gas administering machine, means for securing the valve head in gas tight manner within the yoke, including means thereby caused to move laterally within the yoke and engage the inner side walls thereof to clamp the valve head thereto.

2. In combination with the valve head of a gas tank and the securing yoke of a gas administering machine, a set screw for forcing the valve head against the yoke in gas tight manner within the yoke, and means engageable by said set screw when it is operated which are caused to be moved outwardly thereby to engage the inner side walls of the yoke to clamp the valve head thereto.

3. In combination with the valve head of a gas tank and the securing yoke of a gas administering machine, a set screw for forcing the valve head against the yoke in a gas tight manner within the yoke, a pair of slidable plates engageable by the set screw when it is operated and which are caused to be moved outwardly thereby to engage the inner side walls of the yoke to clamp the valve head thereto.

4. In combination with the valve head of a gas tank and the securing yoke of a gas administering machine, a pair of members mounted in said valve head for freely sliding movement in opposite directions, a set screw having a conical point for forcing the valve head against the yoke in a gas tight manner within the yoke, and means on said members engageable by the set screw when it is operated which cause the members to be moved outwardly thereby to engage the inner side walls of the yoke to clamp the valve head thereto.

5. In combination with the valve head of a gas tank and the securing yoke of a gas administering machine, a pair of plates mounted in said valve head for freely sliding movement in opposite directions, said plates having adjacent portions sloped inwardly, a set screw having a conical point adapted to engage said inwardly sloped faces of the slidable plates whereby when the set screw is forced inwardly it will simultaneously cause the plates to move away from each other laterally to engage the inner side walls of the yoke and thereby clamp the valve head thereto and force the valve head against the inner side of the yoke to hold it clamped thereto in a gas tight manner.

6. In combination with the valve head of a gas tank and the securing yoke of a gas administering machine, said valve head having formed therein a transverse channel and pins secured to the bottom of the channel, a pair of plates formed with slots taking over said pins and movable transversely in the channel, a facing member retaining said plates within the channel formed with a central opening, and a set screw having its point movable through said opening to engage between the plates when the set screw is forced inwardly whereby the plates are caused to engage the inner side walls of the yoke and thereby clamp the valve head thereto and the the valve head is thereby forced against the inner side of the yoke and held clamped thereto in a gas tight manner.

EUGENE J. STEVENS. JAY A. HEIDBRINK. 

